#include<iostream>
#include<signal.h>
#include<unistd.h>
/*
void sigwork(int signumber)
{
    std::cout<<"pid "<<getpid()<<" "<<"signumber: "<< signumber <<std::endl;
}
int main()
{
    signal(SIGINT,sigwork);
    while(1)
    {
        sleep(5);
        std::cout<<"waiting signal"<<std::endl;
    }
    return 0;
}
    */

int main(){
    alarm(0);
    return 0;
}